Router base



FIG. 1 is a front perspective view of a router base showing our new design.

FIG. 2 is a left side elevational view of FIG. 1;

FIG. 3 is a right side elevational view of FIG. 1;

FIG. 4 is a rear elevational view of FIG. 1;

FIG. 5 is a front elevational view of FIG. 1; and,

FIG. 6 is a top plan view of FIG. 1. 

The ornamental design for a router base, as shown and described. 